When setting the part cooling fan speed to a percentage it randomly resets itself to 4.7% during the print. This can happen even when the fan slider is off or no number is inserted. It is also difficult to enter a number in the box as random extra decimal places appear off the screen area.

Focussys
@Focussys
Posts made by Focussys
-
Fan speed changes randomly
-
Strange z axis ticking
HI
I am using a Prusa I3 Mk2 upgraded clone with Ramps 1.4, A8994 drivers and Mattercontrol.
Recently, after printing perfectly for days, the z axis has started ticking and slowly moving upwards before a print. This only happens between pressing the print button and the hotend moving to its print position.
I have tried:
1. Swapping drivers
2. Setting a lower Vref
3. Checking ease of movement of screw threads
The result is a random Z offset and prints not adhering to the bed.This does not occur if I export the gcode file to SDram and insert it into the printer. It prints normally
Anyone had the same? -
Strange startup
Recently when starting the program I am getting an extra stl file loading at the bottom of the queue. It is always the same file which is one I designed some time ago. If I re-start without deleting it, I get another identical copy below it.
I don't really want to reinstall the program without losing all the setup I have.
Not important, but niggly.
-
RE: Kossel Mini prints off the bed!
Solved it!
I needed to set :
Print Area, Print Centre - 0,0 It was set - 100 100
General, Centre Print - OFF It was set - ON
Now prints in the centre of the bed.
-
Kossel Mini prints off the bed!
I have no idea what I have done! I have been printing for months using Mattercontrol with excellent results. Now my Kossel Mini - bed levels, warms up and then shoots off the bed between the Y and Z towers. An emergency reset stops it being silly. A test print with Cura is fine. I haven't the foggiest how to stop it doing this. Any ideas?